What is it about?

The comfort and safety of drivers is the most important factor besides the reliability of the vehicle engines. One the important system used to ensure this is achieved is suspension, which consists of a spring, shock absorber (damper), connecting arms of the wheel system, and the vehicle body. A coil spring is expected to not only be able to withstand vibrations but also loads due to vehicle maneuvers, such as speed, braking, or bending while in motion. It must also be able to reduce, withstand, and absorb impact twisting, and fatigue loads. This research aims to determine the fatigue life of an automotive coil spring driven with different speeds, which are 20 km/h, 40-50 km/h, and more than 70 km/h. Analyzed using Coffin-Manson, Morrow, and Smith-Watson-Topper models.

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Why is it important?

The objective of this work is to determine the fatigue life of a coil spring considering the vehicle speed. The results show that just as the vehicle traveled at a higher speed, the coil spring received greater stress, contributing to shorter fatigue life. At the speed of more than 70 km/h, it was 143 % and 443 % lower than the vehicle traveling at a speed of 40-50 km/h and less than 20 km/h, respectively. This corresponds to the function of the component, which stabilizes the vibrations of the vehicle when driven, with the coil spring working harder at a higher speed.

Perspectives

Writing this article was a great pleasure as it has co-authors with whom I have had long-standing collaborations. This article also leads to rare disease groups contacting me and ultimately to greater involvement in rare disease research.

Muhammad Ramdani Dongoran
Universitas Syiah Kuala

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This page is a summary of: Effect of vehicle speed to the fatigue life of a coil spring based on strain-life approach, January 2019, American Institute of Physics,
DOI: 10.1063/1.5138326.
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